Flue-expander.



P. W. FRANK.

' FLUE EXPANDER. APPLICATION FILED NOV. 29, 1913.

1,1 1 1 ,650. Patented Sept. 22, 1914.

Witnes ses Attorneys to a reversible air motor and the flue or tube- PATENT rnnnnicx WILLIAMTRANK, or noc Y. MOUNT, Home: CAROLINA.

IVLUE-EXPANDER. Y

' Specification of Letters I'atent.

Patented se t. 22, 1914.

5 i nfi ea'uovember 29,1913. Seria1-No.803,745.

ToaZZ whom emay coat-em ingat Rocky Mount5in-the county, of Edgec ombe andState of North Carolina,have ini vented anew and useful Flue Expander, of

which the following is specification! in flue expanders. I

:This invention relates to improvements An object of the present invention to j provide a tool or apparatus which-will ex- "pand'or fl e ubes of aboiler o i-lalli d structures. i h I A further object tool or flue expander which may be secured I expanded by the power thereof.

A further object is toprovide a self-feeding flue expander in'which the expanding members are forcibly driven against the slde walls'of the tube by reason ofa tapered pin being Wedge'dly forced into' contact therepanders {an'd' which structures, also provide for the positive "retraction of the pin and with. The wedged-engagement between the expanding members and pin being had by reason-of the screw thread which drives the plin-giorwardly into engagement with the exwhichf allowsfforthe contraction ofthefex p With .the foregoing and I I I 'vieivwhi'ch will appear as the .descriptlon.

ending members.

' proceeds,"thefinvention resides in the combination and arrangement of parts and in the 1 details of construction hereinafter described and claimed *it'fbeing understood that: changes in the preciseembodiment of the1nvention'hereindisclosed; can be made within H1 thescoperof what is claimedywithout de-- 40.

partingfroin thespirit of the invention.

1 1 Inthe drawings accompanying this specilfication 'andljforming' a part thereof, the

f preferable embodimentof my invention is lar referencenumerals designate correspond,-

I against the side "Be it" known that IyFREDRIOK VViLLL ur "FRANK, a citizen "of theUn ited States,res1dis to provide a calking.

I other objects in Figure 1 is'la longitudinal sectional View 0f my improved flue-expander. Fig. 2 is a cross sectional view'taken on the line 2 of Fig.1. Referring-to so ing parts throughout the several views,}-3' represents the end of a boiler tube and 4 the head plate thereof which isprovided with the openings 5 extendiilg" therethrou'gh and I,

wallsof which the tube 3 is expanded.

A casing 6 is externally threaded as at 7 and is provided at itsuppere'xtremity with the enlarged portion 8. The'inain portion otthe casing is provided with the'longitudinal bore 9 extending therethrough and which COmmUIIICZttGS and is in axial alinement with the bore 10 of the enlarged por- .tion 8. The enlargedportion 8 ofthe oasin'g' is internallythrea'ded as at 11 and is provided with the restricted openings 12 extending through the sidewalls thereof. The

meeting portions ofthe bores 9 and 10 de fine theoutstandingf ledge or shoulder 13 therebetween. I l' A plug 14 threadedly engages the bore 10 and is designed to be held therein by the locking pin 15. Thepin 15 extends through the alined openings12 in the sidewalls of the enlarged portion 8 of the casing and through a suitable opening in the plug and prevents the relative rotations thereof in 1 either direction. The plug isprovided with the outstanding and centrally or axially arranged polygonal lug 16 which may be engaged by an ordinary wrench, or may be inserted directly in the chuck of a' reversible air motor so thereto. v I

A second casing or sleevej17 isinte nally threaded and engages thecasing o. Thus the two-casings areadapted to telescope if they be rotated in onedirection or extended if they have relative rotation imparted thereto in the opposite direction. The casing or sleeve'17fis provided at its lower extremity with the outstanding flange 18, the

said flange with the extremity of the cas ingdefining an annular groovelt). A. plurality-of expanding members '20 are -providedat their upper extre it with the annular-flange 21 whioh-ffl'ange is spaced a distance from the end walls of the expanding members and'heldsopositioned by the arms 22 Theendsj ofthe expanding members" taken in connection with 'the annular I I fianges21andarms'22define an. annular rethej'drawin'gs in which simi-i 'cess 23 which receives the outstanding flange 18 of thecasing thereini A shaft or pin 24 is provided at its upper extremity with the enlarged head 25 which is of such a diameter that it fits within the enlarged portion 8 of the casing and eonthatrotation will be imparted tacts with the ledge 13 thereof. The plug 14; when located in its position as illustrated in Fig. 1, preventsflthe pinQ l from moving longitudinally ofthe casing in one direction, and the ledge 13 prevents such motion in the opposite direction. The pin or shaft is provided with the tapered portion 26 which tapered portion is adapted to contact with the inner frustro-conical surfaces 27 of the expand ng members. The ex- I panding members are provided with a suitable external surface so that when coming into contact with the tube 3 they will form the inner bellied portion 28 and the outer ridge 29 which is at the extremity of the tube. Thusthe boiler head 4 will be securely locked to the tube and the tube will be prevented from moving in either direction by means of the ridge 29 and the bellied portion 28. I v I The circular spring 30embraces the expanding members and is located in an annular groove 31 which extends therearound. The spring provides that the expanding members will be retracted when the tapered pin is withdrawn or retracted from the expanding members. The expanding 1nem-' bers are provided with the ridge '32 extending around their lower extremities and which contacts with the tube 3 to form'the bulged. or bellied portion 28. A second beveled shoulder 33 is provided upon the expanding members and forms the outstand ingridge 29 in the tube.

said expanding members are held against.

In operation the tool or expander is placed within the tube 3.- with the casings 6 and 17 extended so that the lower extremity of the pin or-shaft taper will be in contact -with the expanding members whereby the same will be retracted to such a diameter that they will readily fit within the tube'or flue. The lug 16 is forcibly ro- ,tated and the casing 17 is held against rotation by some suitable handle 34., The relative; rotation of the casing 8 and sleeve 17 will result in the telescoping thereof and the pin orshaft 2 1 being forcibly driven by contacting with the plug ltagainst the in-- ner conical side walls of the expanding member to forcibly expand the same. The

shifting in a longitudinal direction by reason of their interlocklng or-interengagement with the lower extremity of the sleeve or casing 17. In this connection it will be noted that the interengagement referred to r while preventing any longitudinal shifting of the, expanding members, allows them to, .move freely ina transverse direction. The;- tapered portion of the pin-24 willbedriven forcibly against the expanding members un-.

til'such' timeasthe flue has beelrprop'erly expanded into conta'ctwiththe openingin the boiler head and the ridged :or bellied portions formedthereon. .When it isdel 2. A device of sired to remove the expander, the lug 1-6 is rotated in the reversedirectionwith'the re- 'sult that the shoulder 13will contact with. the head of the pin and forcibly move the same in a longitudinal directionso that th plug disposed within the said enlarged end,

means for locking the same. therein, a, ta-

provided with an enlarged head fitting within the enlarged portion of the'casing.

,and'held against longitudinal shifting there by, a sleeve threadedly engaging the said casing, means carried bythe sleeve contacting with the tapered pin adapted'to expand the flue. I prising an externally threadedfcasingprovided with an enlarged head, said casing provided with a bore extending therethrough and communicating with a relatively larger internallyfithreaded bore extending .through said' head, an externally" threaded'plug positioned within said enlarged' head and provided. with a: wrench pered pindisposed within the casingand,

the class described engageable end, means extending through the said head and plug, preventing, the, relativerotations thereof, a sIeeveQthreadedly engaging the said externally threaded 'cas- .ing, and a tapered lpin providedy-withqan enlarged head, said enlarged 'head and .ta'- pered pin housed-within the enlarged head of-the cas'ingand interposed between. the

ledge defined at the meetingjof the: two bores and the said plug, and means carried by the sleeve adaptedco'ntact with a 'fiue.v

i A v 'of theacilasi tasted biii-i prisingya casing,-'a. tapered pin rotatably and non-shiftably carried thereby, asleeve provided with an annular flange. extending I o 4 b expandedginto transversely thereof Jengaging thecasing,

said annular flange secured to :said casing by a reduced portion, said casing, reduced portion and annular...flange defining anan} nular recess, expanding members provided;

with an annular flange spaced. therefrom" and' defining therey'vith an annularrejc ess,

said recesses adapted to receivestheadjacent annular flanges, means disposed upon spring member extendingaround the expanding members, and resiliently contractthe out-e'rsurface of said expanding mem-= bers adapted to iwedgedly engage and 1 ex p'and a flue in contact therewith, anannular,

ing the same, the inner walls of the expand tapered pins adapted to be expanded there:

'ngmember beveled to correspond withthe haturein the presence of two Witnesses..

by,' and a handle rigidly carried by said a 5 sleeve adapted to hold the same against Witnesses:

rotation; a WL J. CULLIN,

'1 In testimony that I claim" the foregoing W, NEIL.

as i ny oWhQI have hereto affixed my sig- EREDRIOK WILLIAMFRANK.

Copies of this patent may be attained-for fi've cent .eachQhy addressing the commissionef of Patents,

washiz lgto n, D. 0 

